JPS6133277U

JPS6133277U - magnetic disk

Info

Publication number: JPS6133277U
Application number: JP11623884U
Authority: JP
Inventors: 了活井上; 光春磯田
Original assignee: ソニー株式会社
Priority date: 1984-07-31
Filing date: 1984-07-31
Publication date: 1986-02-28

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の磁気ディスクを示す平面図、第２図は第
１図のＸ−Ｘ線による断面図、第３図は記録再生装置め
回転駆動機構を示す拡大断面図、第４図は第３図の回転
駆動機構に用いる板はねを示す斜視図、第５図ａ，ｂ
、第６図はチャツキングの説明図、第７図は挿入トルク
特性図、第８図はこの考案の一実施例を示すセンタコア
の第２の穴の拡大平面図、第９図は挿入トルク特性図、
第１０図、第１１図はこの考案の他の実施例を示すセン
タコアの第２の穴の拡大平面図である。図中、Ｄは磁気デイスク、１はセンタコア、ＩＡは第１
の穴、ＩＢは第２の穴、１，、は第３の側壁、１、，２
は第４の側壁、１ｂ３は曲線部、Ｓはスピンドル、Ｌは
板ばね、ＬＴは舌片、Ｐは駆動ビンである。FIG. 1 is a plan view showing a conventional magnetic disk, FIG. 2 is a sectional view taken along the line X-X in FIG. A perspective view showing the plate spring used in the rotational drive mechanism of Fig. 3, Fig. 5 a, b
, Fig. 6 is an explanatory diagram of chucking, Fig. 7 is an insertion torque characteristic diagram, Fig. 8 is an enlarged plan view of the second hole of the center core showing an embodiment of this invention, and Fig. 9 is an insertion torque characteristic diagram. ,
10 and 11 are enlarged plan views of the second hole of the center core showing another embodiment of this invention. In the figure, D is the magnetic disk, 1 is the center core, and IA is the first
hole, IB is the second hole, 1,, is the third side wall, 1,,2
is the fourth side wall, 1b3 is the curved portion, S is the spindle, L is the leaf spring, LT is the tongue piece, and P is the drive bottle.

Claims

[Scope of utility model registration request]

A first hole into which a spindle of a recording/reproducing device enters, and a second hole into which a drive pin rotates integrally around the spindle and is attached with an elastic member so as to be deflectable, and a second hole into which a drive pin is inserted, A magnet having a setter core such that the drive pin inserted into the hole is pressed against the linear cam side and the drive side forming the second hole by the biasing force of the elastic member, and is chucked and rotationally driven. 1. A magnetic disk characterized in that a curved portion is provided on the cam side to reduce insertion torque when chucking the magnetic disk.